22056643503621 has 12 divisors (see below), whose sum is σ = 31861724738220. Its totient is φ = 14703446587200.

The previous prime is 22056643503599. The next prime is 22056643503673. The reversal of 22056643503621 is 12630534665022.

22056643503621 is a `hidden beast` number, since 2 + 2 + 0 + 566 + 4 + 3 + 50 + 36 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 347287454721 + 21709356048900 = 589311^2 + 4659330^2 .

It is not a de Polignac number, because 22056643503621 - 2¹⁹ = 22056642979333 is a prime.

It is a super-2 number, since 2×22056643503621² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22056643505621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81725730 + ... + 81995171.

It is an arithmetic number, because the mean of its divisors is an integer number (2655143728185).

Almost surely, 2^{22056643503621} is an apocalyptic number.

It is an amenable number.

22056643503621 is a deficient number, since it is larger than the sum of its proper divisors (9805081234599).

22056643503621 is a wasteful number, since it uses less digits than its factorization.

22056643503621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163735876 (or 163735873 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 45.

The spelling of 22056643503621 in words is "twenty-two trillion, fifty-six billion, six hundred forty-three million, five hundred three thousand, six hundred twenty-one".